Swaged saw-tooth shaper



April` 29, 1924. 1,492,093

W. C. BARNHART SWAGED SAW TOOTH SHAPER Filed Sept. l, 1921 lBY EET/ L5. WM

ATTORNEY Patented Apr. 29, 1924.

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WALTER c. BARNART, or sEAT'TLE, wAsiiiNGToN.

swnenn SAW-Toorn snaren.

Application filed September 1', 1921. Serial lo.V 497,429.

To all whom it may concern.

Be it known that l, lVAL'rnn C. BAHN HART, a citizen of the United States, residing at Seattle, in the county of King and State ot l/Vashington, have invented certain new and useful Improvements in Swaged Saw-Tooth Shapers, of which the following is a specification. i

This invention relates to saw-tooth shaping devices such as used for treating swaged teeth to produce sideclearance tl1ereto`."`

The object of my invention is the improvement of y'devices of this character to insure greater uniformity tothe teeth and be otherwise more eilici'ent.y

` Other objects and advantages oi' the invention will appear in the followingspe'ciiication.

The invention consists in the novel 'construction, arrangement and Combination of parts hereinafter described and claimed.

ln the accompanying drawings,`-

Figure 1 is side elevation, partly broken away, of the improved Shaper applied yto a saw. Figs. 2, 3 and 4 are sectional views through 2 2, 3 3 and 1-4 Of Fig.-1. Fig. 5 Vis a sectional view taken substantially through 5-5 oft' Fig. 2. Fig. 6 is a perspec` tive view of one of the tooth shaping dies; and Fig. 7 is a perspective view of a die holder sho-wn detached. n n f Referring to the drawings, 8 represents a hsaw having swaged 'teeth`9 which"arey to be shaped at opposite sides.

10 represents generally the frame or body of my device comprisingapostfinember 11 extending upwardly from ain end offa'ba'r member 12 and above a side. element'olf' a' substantially U-shaped member' 13. Said frame is preferably, though not necessarily, composed of an integral casting.

The frame bar member 12 is provided in its underside 'with a grbove 121 to' receive removable side pla-tes 15 and a bar 16"'ar'- ranged as shown in Fig. 3 toaiiordY a' re-y cess 17 'to accommodate the saw teelth 9; The bai' 16 extends `beyond the bar member 12 as a relatively narrow finger 161 into the opening between thek limbs ofthe/frame member 13. p

Theoter limb 18 of the frame rmember 13 is provided with a plane' side surface 19 against which are secured work positioningy bars 20 and 21 means of a ola'mping block 22 anda bolt 23. 1

rilhebloclr 22 isprovidedin itssid'e next' to the frame with recesses 24 and 25 (Fig. 1) for holding said positioning bars in the relative' angular" relations with each other in which they are represented in Fig. l.

At theirfinner'ends said positioning bars are provided with bevel surfaces 201 and 211 to vengage the upper andlower surfaces of a 'saw tooth'for locating the device to shape the side faces of such tooth.

In. order to regulate ksaid positioning bars to suit saws with different inclinations of teeth, the block 22 is providedV with tongue elements 26 (Fig. 4^) engaged in an arcuate` guideway 27 'provided in the frame part 18 and a slot 28 is provided in the latter for the clamping bolt' 23.V Y y y Y 29 represents spring metal arms depending from the frame' member 12 to engage a saw blade 8 yat opposite' sides for maintaining the device in upright position on a saw. A handle 3() is a'clvaiitageously secured to the 'frame member 12 for moving the device to present vthe bars 2O and 21 to a saw tooth. In such shifting of the device thebar iinger 161 temporarily resting 'on a tooth serves to direct thedevice sothat a tooth point will be guided into the angle between the beveled ends oi the positioning bars 2O and 21. Mounted for vertical movements on the post 1-1 and secured in adjusted positions there to by means of a' screw' 31 is a body 32 having' atzits l'werV end'a forwardly projecting portion 321 (Fig. y2) which terminates in upwardly extending standard elements, such as 322. Said body is also* provided Vat opposite 4sides with"- apertured lugs 323 to which companion levers 33 are fulcrume'd by means of pins 83a. Theu'pper arms 331 of these levers 'carry rollersa'which engage against cam surfaces lprovided on an' operating lever 36 which isfulcrumed a pin 37 to standards 322. y

The lower arms 832 of the levers 33 vare bored transversely of the device to afford socketsfBS'ior cylindrical barrels 39. These barrels bear respectively against plugs 410 having peripheral iianges 11 which, in turn, bear against annular seats 1-2 provided at the outer ends of 'the sockets.

As be'stV shown in Figs. 5 and f1', a barrel 39 is provided with a rectangular aperture 13 extending its entire length and in which are' fitted in side by side relations a tooth shaping die 4e and a stop 45. Tliedie and stop of each barrel rabut against set screws 46 and' .47 which are" individually adjustable Y in threaded holes provided in theV respective the lever arms at opposite sides oftheslots- 49 by means of bolts 50. n Y A l represents anadjustable stop for limiting the'eifectivemovement of the operating lever 36 to regulate the influence of the cam elements thereof on the dies 44 stops 45 with respect to therwork. Y

After the teeth of a saw have been svvaged my shaping device is applied to *a sawY by having the grooved barrmemberlQl of-.thev

Shaper frame straddle thesaW as-shoWn in Figs'. A1 and 3,. Thus supported on asaw, the frame is positioned with respect to a tooth by engaging theflatter between the bevel surfaces 201 and 211 (see Fig. l) ofV the positioning bars and 2l. The lever 36 is then operated to actuate through the medium of its lcam elements the companion levers 33 whereby the dies 44 and the stops are respectively'broughtagainst thesi'des of the ,swaged portion of the tooth and the adjacent plane thereof. In such action the bevel parts 441 of the diel ends serve to shape both'sides of the tooth points to a suitable clearance and to similar eX- tents by reason of theV` stops 45 regulating the positionsl of the-dies laterally of the saw when the stops mutually encounter the tooth. The Vdies 44 and stops 45 are adjusted longitudinally thereof and with respect to each other by means of therespective set screws 46 and 47, and maybe rotatab-ly adjusted by rotatably regulatingthe barrels'39 in' the sockets therefor of the levers 33. |The rotary adjustment-of the dies are of importance as it lenables the same to rbe setto bevel thev teeth to predetermined angles for producing both Vback andrunder clearances, so called, to the teeth Y as` may be desired. Another important feature of the Vinvention'is the provision of devices, comprising body V32 andthe screw 31, whereby the levers Y33 maybe verticallyv not onlylocate the device to present the dies in register with a tooth, but also are adjustable to teeth having different angular relations with respect to a saw blade. 1 What I claim, is,

l, ln a saw-tooth shaperrvo'f *thel character` described, the combination of a pair of companion 1evers,`transversely` disposed savvtooth shaping diescarried bythe respective levers `and arranged for longitudinal and rotary adjustments' therein, Ymeans for securing each of said dies in both its longitudinal and rotaryvpositions in the respec- Vtx'elever7 a transversely disposed stop 'pro-V vided for each of said dies, means for regu- Vlating thepositions of said stops to engagea saw-'blade yfor limiting the actionof said dies with respect to a saw-tooth, and means for operating said levers.

2. In a saw-tooth Shaper of the character described,` the combination With the sliaper frame, saw-tooth shaping dies movable transversely of said frame, and Vmeans to actuate said dies, tvv'o'rbars providedon the d frame and engageable With the saw-tooth to be operated uponfor regulating the positions kof said" dies Vwith respect to the sawtooth, and meansfor'adjusting the angular positions of bothofsaid bars With respect to thefaXesofsa-id dies. 'I

3.- In a saW-toothshaper of the character' described, the combination. With the frame,

of Va Vpair of companion levers adjustably movable vertically ofthe frame, barrel members rotatably mounted in corresponding arms of the respective levers, a sawtooth shaping die and a saw-blade engaging bar provided in each of said barrels, meansy for independently adjusting the positions of said Vdies and barsaxiallyY of the respectivefbarrels,.and means to actuate said levers toj render said diesl and'bars' operable.

-4. In a saw-tooth Shaper of the character described, the 'combination of Ya pair Ofcompanion levers, barrel members: rotatably' mounted in the respective levers,. a savvtootli shaping die anda saw-blade stop bar provided in sideby side relations in the respective barrels, means'for regulating the positions of said dies and bars With respect to each other,jandmeans to actuate saidv levers to effect the operation of the dies.Y

5. In aVsaW-tooth Shaper of the character describedfthe combination with the frame,V

saw-tooth 'shaping dies, and Ameans for operating sani-dies in unison, saw-tooth engaging bars provided'.V on said frame for positioning the 4dies with respect to' the Work, said bars being disposed in angular rrelations with respect to eachother, said bars being individually Yadjustable longitu-v saidfbars 4with respect to 'the saw-tooth toV be operated on. Y Y Y 6.* In a saw-tooth Shaper of the' character described, the` combination With aY frame having'a recess to yreceive a saw, of a bodyy connectedfor'vertical adjustments t0 said Y frame, companion levers carried by said body, tr'ansversely ,arranged 'slotted barrel lsb members rotatably mounted in arms of said levers, a saw-tooth shaping die and a sawblade engaging stop provided in the slot of each of said barrels, means carried by the respective levers for adjusting the positions of said dies and the saw-blade stop independently of each other, and a hand lever carried by said body and provided With cam elements for actuating said levers to operate said dies.

7. ln a saw-tooth shaper of the character described, the combination With a frame having a recess to receive a saw, of independently adjustable bars engageable With the saw-tooth operated on for positioning the Shaper with reference thereto, a body connected for vertical adjustments to said frame, companion levers carried by said body, transversely arranged slotted barrel members rotatably mounted in arms of said levers, a saw-tooth shaping die and a savvblade engaging stop provided in the slot of each of said barrels, means carried by the respective levers :tor adjusting the pos1tions of said dies and the saw-blade stop independently of each other, and means for actuating said levers to operate said dies.

8. In a saw-tooth Shaper of the character described, the combination With a frame having a recess to receive a saw, of independently adjustable bars engageable with the saw-tooth operated on for positioning the shaper with reference thereto, companion levers carried by said frame, transversely arranged slotted barrel members rotatably mounted in arms of said levers, a

saw-tooth shaping die and a saw-blade er1- `gaging stop provided in the slot of each of said barrels, means carried by the respective levers for adjusting the positions of said dies and the saw-blade stop independently of each other, and means for actuating said levers to operate said dies.

9. In a sawtooth Shaper of the character described, the combination with a frame having a recess to receive a saw, of independently adjustable bars engageable with the saw-tooth operated on for positioning the shaper with reference thereto, a body connected for vertical adjustments to said frame, companion levers carried by said body, transversely arranged slotted barrel members rotatably mounted in arms of said levers, a saw-tooth shaping die and a sawblade engaging stop provided in the slot of each of said barrels, means carried by the respective levers for adjusting the positions of said dies and the saw-blade stop independently of each other, and a hand lever carried by said body and provided with cam elements for actuating said levers to operate said dies.

10. vIn a saw-tooth Shaper of the character described, the combination With a frame having a recess to receive a saw, of a body connected for vertical adjustments to said frame, companion levers carried by said body, transversely arranged slotted barrel members rotatably mounted in arms of said levers, a saw-tooth shaping die. and a savvblade engaging stop provided in the slot of each of said barrels, means carried by the respective levers for adjusting the positions of said dies and the saw-blade stops independently of each other, and means for actuating said levers to operate said dies.

Signed at Seattle, Washington, this 26th day of August, 1921.

WALTER C. BARNHART.

Witnesses: f

PIERRE BARNES, MARGARET G. SUPPLE. 

